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			<span id="titleName">数据库概论-作业二</span>			
			<a class="exams-time">姓名&nbsp;:&nbsp;高佳琪</a>
			<a class="exam-userid"><i class="fa fa-sign-in" aria-hidden="true"></i> 学号&nbsp;:&nbsp;192373412300004</a>		
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				<div id="shijuandiv"><p class="p-title">一、单选(<span class="p-title p-pqtDesc">共计100分,每题2.5分</span>)</p>       <!-- 1 单项选择题 -->             <div id="Q_1" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">1、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">文件系统与数据库系统的本质区别是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">。</span><span lang="EN-US" style="font-family:宋体">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87672A" type="radio" name="87672" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据共享</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87672B" type="radio" name="87672" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据独立</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87672C" type="radio" name="87672" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据结构化</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87672D" type="radio" name="87672" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据冗余</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_2" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">2、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">对于学生</span><span lang="EN-US">--</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">选课</span><span lang="EN-US">--</span><span style="font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">课程的三个关系：</span></p> <p class="MsoNormal"><span lang="EN-US">S(S#,SNAME,SEX,AGE)</span></p> <p class="MsoNormal"><span lang="EN-US">SC(S#,C#,GRADE)</span></p> <p class="MsoNormal"><span lang="EN-US">C(C#,CNAME,TEACHER)</span></p> <p class="MsoNormal"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">为了提高查询速度，对</span><span lang="EN-US">SC</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">表创建唯一索引，应建</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">个组上。</span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91903A" type="radio" name="91903" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">A.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">（</span><span lang="EN-US">S#,,C#</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">）</span><span lang="EN-US"><span style="mso-tab-count:1"> </span></span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91903B" type="radio" name="91903" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">B.S#<span style="mso-tab-count:1"> </span></span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91903C" type="radio" name="91903" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">C.C#</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91903D" type="radio" name="91903" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">D.GRADE</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">   <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_3" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">3、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据库概念设计的</span><span lang="EN-US">E-R</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">方法中，用属性描述实体的特征，在</span><span lang="EN-US">E-R</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">图中用</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">表示属性。</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87706A" type="radio" name="87706" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">矩形</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87706B" type="radio" name="87706" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">四边形</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87706C" type="radio" name="87706" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">菱形</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87706D" type="radio" name="87706" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">椭圆形</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_4" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">4、<span lang="EN-US" style="font-size:14.0pt">__</span><span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">由数据结构、关系操作集合和完整性约束三个部分组成。</span><span lang="EN-US" style="font-size:14.0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91923A" type="radio" name="91923" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">A.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">关系模型</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91923B" type="radio" name="91923" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">B.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">关系</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91923C" type="radio" name="91923" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">C.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">关系模式</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91923D" type="radio" name="91923" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US" style="font-size:14.0pt">D.</span><span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">关系数据库</span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_5" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">5、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">在</span><span lang="EN-US">SQL</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">中，与关系代数中投影运算对应的子句是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91916A" type="radio" name="91916" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">SELECT<span style="mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91916B" type="radio" name="91916" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">FROM<span style="mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91916C" type="radio" name="91916" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">WHERE<span style="mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91916D" type="radio" name="91916" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">ORDER BY</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:  0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_6" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">6、<span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">在</span><span lang="EN-US" style="font-size:14.0pt">DBMS</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">中，实现事务持久</span><span style="font-size:14.0pt"> </span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">性的子系统是</span><span lang="EN-US" style="font-size:14.0pt">___</span><span style="font-size:14.0pt;  font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91934A" type="radio" name="91934" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">A.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">恢复管理子系统</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91934B" type="radio" name="91934" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">B.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">完整性管理子系统</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91934C" type="radio" name="91934" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">C.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">并发控制子系统</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91934D" type="radio" name="91934" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">D.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">安全管理子系统</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_7" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">7、<span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">在数据库操作过程中，事务处理是一个操作序列，必须具有以下性质：原子性、一致性、隔离性和</span><span lang="EN-US" style="font-size:14.0pt">___</span><span style="font-size:14.0pt;  font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91932A" type="radio" name="91932" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">A.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">共享性</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91932B" type="radio" name="91932" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">B.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">继承性</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91932C" type="radio" name="91932" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">C.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">持久性</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91932D" type="radio" name="91932" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">D.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">封装性</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_8" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="margin-left:0cm;text-indent:0cm;mso-list:l9 level1 lfo4">8、 <!--[if !supportLists]--><span lang="EN-US" style="mso-fareast-font-family:&quot;Times New Roman&quot;"><span style="mso-list:Ignore">(1)</span></span> <!--[endif]--><span lang="EN-US">.___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">是长期存储在计算机内的有组织的、可共享的数据集合。</span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91892A" type="radio" name="91892" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">A.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据管理系统</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91892B" type="radio" name="91892" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">B.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据库系统</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91892C" type="radio" name="91892" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">C.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据库</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91892D" type="radio" name="91892" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">D.</span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">文件组织</span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_9" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">9、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">关系模式的任何属性</span><span lang="EN-US">___</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91905A" type="radio" name="91905" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">A</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">不可再分</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91905B" type="radio" name="91905" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">B.</span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">可再分</span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91905C" type="radio" name="91905" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">C.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">命名在该关系模式中可以不唯一</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91905D" type="radio" name="91905" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">D.</span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">以上都不是</span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_10" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">10、<span lang="EN-US">SQL</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">语言中，定义数据表的语句是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87645A" type="radio" name="87645" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">Select</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87645B" type="radio" name="87645" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">Insert</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87645C" type="radio" name="87645" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">Update</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87645D" type="radio" name="87645" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">Create</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_11" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">11、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">同一个关系模型的任两个关系值</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91904A" type="radio" name="91904" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">A.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">不能全同</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91904B" type="radio" name="91904" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">B.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">可全同</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91904C" type="radio" name="91904" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">C.</span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">必须全同</span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91904D" type="radio" name="91904" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">D.</span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">以上都不是</span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_12" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">12、<span lang="EN-US">DB</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">的三级结构模式结构中最接近用户的是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87673A" type="radio" name="87673" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">内模式</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87673B" type="radio" name="87673" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">外模式</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87673C" type="radio" name="87673" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">概念模式</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87673D" type="radio" name="87673" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">用户模式</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_13" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">13、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">下列不属于需求分析阶段工作的是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87646A" type="radio" name="87646" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">分析用户活动</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87646B" type="radio" name="87646" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">建立</span><span lang="EN-US">E-R</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">图</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87646C" type="radio" name="87646" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">建立数据字典</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87646D" type="radio" name="87646" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">建立数据流图</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_14" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">14、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">在</span><span lang="EN-US">SQL</span><span style="font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">中，对嵌套查询的处理原则是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91918A" type="radio" name="91918" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">从外层向内层处理</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91918B" type="radio" name="91918" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">B.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">从内层向外层处理</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91918C" type="radio" name="91918" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">C.</span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">内、外层同时处理</span><span lang="EN-US"><span style="mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91918D" type="radio" name="91918" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">D.</span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">内、外层交替进行</span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_15" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">15、<span lang="EN-US">SQL</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">语言的数据操纵<span class="GramE">句包括</span></span><span lang="EN-US">SELECT</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:  &quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">，</span><span lang="EN-US">INSERT</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:  &quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">，</span><span lang="EN-US">UPDATE</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:  &quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">和</span><span lang="EN-US">DELETE</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:  &quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">，最重要的，也是使用最频繁的语句是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87704A" type="radio" name="87704" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">SELECT</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87704B" type="radio" name="87704" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">INSERT</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87704C" type="radio" name="87704" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">UPDATE</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87704D" type="radio" name="87704" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">DELETE</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_16" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="margin-left:0cm;text-indent:0cm;mso-list:l9 level1 lfo4">16、 <!--[if !supportLists]--><span lang="EN-US" style="mso-fareast-font-family:&quot;Times New Roman&quot;"><span style="mso-list:Ignore">(4)</span></span> <!--[endif]--><span lang="EN-US">.</span><span lang="EN-US" style="font-size:14.0pt"> </span><span style="font-size:14.0pt;  font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据库中的封锁机制是</span><span lang="EN-US" style="font-size:14.0pt">___</span><span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">的主要方法。</span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91935A" type="radio" name="91935" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">A.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">安全性</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91935B" type="radio" name="91935" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">B.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">完整性</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91935C" type="radio" name="91935" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:14.0pt">C.</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">并发控制</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91935D" type="radio" name="91935" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US" style="font-size:14.0pt">D.</span><span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">恢复</span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_17" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">17、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">对</span><span lang="EN-US">DB</span><span style="font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">中数据操作分为两大类</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87718A" type="radio" name="87718" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">查询和更新</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87718B" type="radio" name="87718" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">检索和修改</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87718C" type="radio" name="87718" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">查询和修改</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87718D" type="radio" name="87718" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">插入和删除</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_18" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">18、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">在关系数据库系统中，为了简化用户的查询操作，而又不增加数据的存储空间，常用的方法是创建</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">。</span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91919A" type="radio" name="91919" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">A.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">另一个表</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91919B" type="radio" name="91919" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">B.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">游标</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91919C" type="radio" name="91919" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">C.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">视图</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91919D" type="radio" name="91919" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">D</span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">索引</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_19" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">19、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">与</span><span lang="EN-US">Where G BETWEEN 60 AND 100</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">语句等价于</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87705A" type="radio" name="87705" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">Where G&gt;60AND G&lt;100</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87705B" type="radio" name="87705" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">Where G&gt;=60 AND G&lt;100</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87705C" type="radio" name="87705" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">Where G&gt;60 AND G&lt;=100</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87705D" type="radio" name="87705" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">Where G&gt;=60 AND G&lt;=100</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_20" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">20、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">如果两个实体之间的联系是</span><span lang="EN-US">M:N,</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">则</span><span lang="EN-US">___</span><span style="font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">引入第三个交叉关系。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87676A" type="radio" name="87676" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">不需要</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87676B" type="radio" name="87676" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">需要</span><b style="mso-bidi-font-weight:normal"><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">   <o:p></o:p></span></b></p>           </label><br>                     <label style="display:inline-block;">            <input id="87676C" type="radio" name="87676" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">可有可无</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87676D" type="radio" name="87676" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">合并为两个实体</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_21" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">21、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据库管理技术经历了人工管理、</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">、三个阶段。</span></p> <p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt;  mso-char-indent-count:0;mso-list:l1 level1 lfo2"> <!--[if !supportLists]--><span lang="EN-US" style="font-family:Microsoft Yahei;mso-bidi-font-family:宋体"><span style="mso-list:Ignore">①<span style="font:7.0pt &quot;Times New Roman&quot;">&nbsp; </span></span></span> <!--[endif]--><span lang="EN-US" style="font-family:宋体">DBMS </span><span style="font-family:宋体">②文件系统 ③网状系统 ④数据库系统 ⑤关系系统<span lang="EN-US">   <o:p></o:p></span></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87642A" type="radio" name="87642" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:宋体">③和⑤</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87642B" type="radio" name="87642" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:宋体">②和③</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87642C" type="radio" name="87642" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:宋体">①和④</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87642D" type="radio" name="87642" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:宋体">②和④</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_22" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">22、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">在关系中某一属性组的值能唯一地标识一个元组，则该属性组为</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91902A" type="radio" name="91902" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">A.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">主键</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91902B" type="radio" name="91902" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">B.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">候选键</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91902C" type="radio" name="91902" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">C.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">主属性</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91902D" type="radio" name="91902" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">D.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">外键</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_23" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">23、<span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">事务是持久性是指</span><span lang="EN-US" style="font-size:14.0pt">___</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91933A" type="radio" name="91933" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US" style="font-size:14.0pt">A.</span><span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">事务一旦提交，对数据库的改变是永久的</span><span lang="EN-US" style="font-size:14.0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91933B" type="radio" name="91933" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US" style="font-size:14.0pt">B.</span><span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">事务中包括的所有的操作要么都做，要么都不做</span><span lang="EN-US" style="font-size:14.0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91933C" type="radio" name="91933" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US" style="font-size:14.0pt">C.</span><span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">一个事务内部的操作及使用的数据对并发的其他事务是隔离的</span><span lang="EN-US" style="font-size:14.0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91933D" type="radio" name="91933" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US" style="font-size:14.0pt">D.</span><span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">事务必须是使数据库从一个一致性状态变到另一个一致性状态</span><span lang="EN-US" style="font-size:14.0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_24" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">24、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据库管理系统通常提供授权功能来控制不同用户访问数据的权限，这主要是为了实现数据库的</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87720A" type="radio" name="87720" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">可靠性</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87720B" type="radio" name="87720" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">一致性</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87720C" type="radio" name="87720" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">完整性</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87720D" type="radio" name="87720" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">安全性</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_25" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">25、<span lang="EN-US">SQL</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">中，下列涉及空值的操作，不正确的是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87674A" type="radio" name="87674" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">age=NULL</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87674B" type="radio" name="87674" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">age IS NULL</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:  0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87674C" type="radio" name="87674" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">age IS NOT NULL</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87674D" type="radio" name="87674" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">NOT(age IS NULL)</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:  0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_26" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">26、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">从</span><span lang="EN-US">E-R</span><span style="font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">模型关系向关系模型转换时，一个</span><span lang="EN-US">M:N</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">联系转换为关系模式时，该关系模式的主键是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87721A" type="radio" name="87721" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">“</span><span lang="EN-US">M</span><span style="font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">”端实体的主键</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87721B" type="radio" name="87721" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">“</span><span lang="EN-US">N</span><span style="font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">”端实体的主键</span><b style="mso-bidi-font-weight:normal"><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">   <o:p></o:p></span></b></p>           </label><br>                     <label style="display:inline-block;">            <input id="87721C" type="radio" name="87721" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">“</span><span lang="EN-US">M</span><span style="font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">”端实体与“</span><span lang="EN-US">N</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">”端实体的组合</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87721D" type="radio" name="87721" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">重新选取其他属性</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_27" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">27、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">在文件系统阶段，数据</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91889A" type="radio" name="91889" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">A.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">无独立性</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91889B" type="radio" name="91889" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">B.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">独立性差</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91889C" type="radio" name="91889" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">C.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">具有物理独性</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91889D" type="radio" name="91889" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">D.</span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">具有逻辑独立性</span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_28" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">28、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">在数据库中存储的是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="font-family:宋体">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87687A" type="radio" name="87687" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87687B" type="radio" name="87687" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据模型</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87687C" type="radio" name="87687" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据以及数据之间的关系</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87687D" type="radio" name="87687" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">信息</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_29" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">29、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">为了对表中的各行进行快速访问，应对此表建立</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">。</span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91920A" type="radio" name="91920" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">A</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">约束</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91920B" type="radio" name="91920" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">B. </span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">规则</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91920C" type="radio" name="91920" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">C. </span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">索引</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91920D" type="radio" name="91920" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">D. </span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">视图</span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_30" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">30、<span lang="EN-US">SQL</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">语句执行的结果是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91917A" type="radio" name="91917" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据项</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91917B" type="radio" name="91917" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">元组</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91917C" type="radio" name="91917" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">表</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91917D" type="radio" name="91917" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据库</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_31" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">31、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">下列聚合函数中正确的是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87689A" type="radio" name="87689" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">SUM(*)</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87689B" type="radio" name="87689" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">MAX(*)</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87689C" type="radio" name="87689" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">COUNT(*)</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87689D" type="radio" name="87689" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">AVG(*)</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_32" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">32、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">在关系数据库设计中用</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">来表示实体与实体之间的联系。</span><span lang="EN-US" style="font-family:  宋体">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87717A" type="radio" name="87717" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">树结构</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87717B" type="radio" name="87717" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">封装结构</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87717C" type="radio" name="87717" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">二维表结构</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87717D" type="radio" name="87717" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">图结构</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_33" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">33、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">在关系代数运算中，五种基本运算为</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87643A" type="radio" name="87643" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">并、差、选择、投影、自然连接</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87643B" type="radio" name="87643" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">并、差、交、选择、投影</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87643C" type="radio" name="87643" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">并、差、选择、投影、乘积</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87643D" type="radio" name="87643" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">并、差、交、选择、乘积</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_34" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">34、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">为了对表中的各行进行快速访问，应对此表建立</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87644A" type="radio" name="87644" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">约束</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87644B" type="radio" name="87644" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">规则</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87644C" type="radio" name="87644" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">索引</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87644D" type="radio" name="87644" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">视图</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_35" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">35、<span lang="EN-US">Where</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">子句的条件表达式中，可以匹配单个字符的通配符是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87660A" type="radio" name="87660" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">*</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87660B" type="radio" name="87660" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">%</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87660C" type="radio" name="87660" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">_</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87660D" type="radio" name="87660" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">?</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_36" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">36、<span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">数据库系统阶段，数据</span><span lang="EN-US" style="font-size:14.0pt">____</span><span style="font-size:14.0pt;font-family:  宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91891A" type="radio" name="91891" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">具体物理独立性</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91891B" type="radio" name="91891" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:  &quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">具有物理独立性和逻辑独立性</span><span lang="EN-US" style="font-size:14.0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91891C" type="radio" name="91891" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:  &quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">独立性差</span><span lang="EN-US" style="font-size:14.0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91891D" type="radio" name="91891" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-size:14.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">具有高度的物理独立性和一定程度的逻辑独立性</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_37" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">37、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据库系统阶段，数据</span><span lang="EN-US">____</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91890A" type="radio" name="91890" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">A</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">具体物理独立性</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91890B" type="radio" name="91890" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">B.</span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">具有物理独立性和逻辑独立性</span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91890C" type="radio" name="91890" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">C.</span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">独立性差</span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91890D" type="radio" name="91890" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">D.</span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">具有高度的物理独立性和一定程度的逻辑独立性</span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_38" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">38、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">在关系模式中，视图是三级模式结构中的</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">。</span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="91906A" type="radio" name="91906" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">A.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">内模式</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91906B" type="radio" name="91906" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">B.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">外模式</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91906C" type="radio" name="91906" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US">C.</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">概念模式</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="91906D" type="radio" name="91906" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span lang="EN-US">D.</span><span style="font-family:Microsoft Yahei;  mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;">用户模式</span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_39" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">39、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;  mso-hansi-font-family:&quot;Times New Roman&quot;">在数据库中存储的是</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">。</span><span lang="EN-US" style="font-family:宋体">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87657A" type="radio" name="87657" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87657B" type="radio" name="87657" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据模型</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87657C" type="radio" name="87657" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据以及数据之间的关系</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87657D" type="radio" name="87657" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">信息</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;  mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_40" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="mso-pagination:widow-orphan">40、<span lang="EN-US">SQL</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">语言具有</span><span lang="EN-US">___</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">的功能。</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="87658A" type="radio" name="87658" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">关系规范化、数据操纵、数据控制</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87658B" type="radio" name="87658" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据定义、数据操纵、数据控制</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87658C" type="radio" name="87658" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据定义、关系规范化、数据控制</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="87658D" type="radio" name="87658" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:  &quot;Times New Roman&quot;">数据定义、关系规范化、数据操纵</span><span lang="EN-US" style="mso-bidi-font-size:  10.5pt;mso-font-kerning:0pt">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div></div>
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			<div class="col-md-2 col-sm-2 col-xs-12 exam-body-back">
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					<h4><i class="glyphicon glyphicon-hourglass" aria-hidden="true"></i>&nbsp;倒计时</h4>
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					<p id="kaoshitimeleft">01 : 39 : 56</p>				
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				<div id="datika" class="col-md-12"><div class="col-md-12 col-sm-12 col-xs-12 pad-0">      <p class="" style="display:block;">一、单选</p>                     <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_1" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_1" class="answerselect" style="background-color: red;">1</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_2" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_2" class="answerselect" style="background-color: red;">2</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_3" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_3" class="answerselect" style="background-color: red;">3</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_4" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_4" class="answerselect" style="background-color: red;">4</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_5" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_5" class="answerselect" style="background-color: red;">5</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_6" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_6" class="answerselect" style="background-color: red;">6</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_7" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_7" class="answerselect" style="background-color: red;">7</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_8" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_8" class="answerselect" style="background-color: red;">8</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_9" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_9" class="answerselect" style="background-color: red;">9</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_10" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_10" class="answerselect" style="background-color: red;">10</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_11" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_11" class="answerselect" style="background-color: red;">11</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_12" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_12" class="answerselect" style="background-color: red;">12</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_13" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_13" class="answerselect" style="background-color: red;">13</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_14" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_14" class="answerselect" style="background-color: red;">14</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_15" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_15" class="answerselect" style="background-color: red;">15</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_16" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_16" class="answerselect" style="background-color: red;">16</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_17" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_17" class="answerselect" style="background-color: red;">17</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_18" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_18" class="answerselect" style="background-color: red;">18</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_19" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_19" class="answerselect" style="background-color: red;">19</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_20" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_20" class="answerselect" style="background-color: red;">20</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_21" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_21" class="answerselect" style="background-color: red;">21</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_22" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_22" class="answerselect" style="background-color: red;">22</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_23" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_23" class="answerselect" style="background-color: red;">23</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_24" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_24" class="answerselect" style="background-color: red;">24</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_25" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_25" class="answerselect" style="background-color: red;">25</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_26" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_26" class="answerselect" style="background-color: red;">26</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_27" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_27" class="answerselect" style="background-color: red;">27</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_28" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_28" class="answerselect" style="background-color: red;">28</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_29" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_29" class="answerselect" style="background-color: red;">29</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_30" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_30" class="answerselect" style="background-color: red;">30</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_31" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_31" class="answerselect" style="background-color: red;">31</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_32" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_32" class="answerselect" style="background-color: red;">32</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_33" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_33" class="answerselect" style="background-color: red;">33</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_34" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_34" class="answerselect" style="background-color: red;">34</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_35" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_35" class="answerselect" style="background-color: red;">35</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_36" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_36" class="answerselect" style="background-color: red;">36</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_37" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_37" class="answerselect" style="background-color: red;">37</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_38" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_38" class="answerselect" style="background-color: red;">38</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_39" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_39" class="answerselect" style="background-color: red;">39</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_40" href="http://wljy.whut.edu.cn/web/showexercise.htm?stuId=192373412300004&amp;instNo=4740384&amp;limitTime=100#Q_40" class="answerselect" style="background-color: red;">40</a></div>                  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